單項選擇題

The dumping of refuse in a lock is permitted（）.

A.when approved by the lockmaster
B.when locking downbound
C.at no time
D.during high water only

你可能感興趣的試題

The disadvantage of using a heaving line to pass a towline is that（）.

A.it increases the likelihood of collision between the towing vessel and the disabled vessel
B.recreational boaters tend to make the heaving line fast to the towed vessel as if it were the towline
C.the monkey fist may injure someone
D.it may reduce the catenary and increase yawing

單項選擇題

The direction in which a vessel is steered is the course. The path actually followed is the （）.

A.route
B.track
C.heading
D.course over the ground